Why does my cell phone shut down when the battery is 70% charged?

Check battery and connection alternator too.

may be the battery's life is up. try replacing the battery.
before buying a new one, try changing with another battery to check if its a battery problem or phone problem

Your laptop's battery cells are dying. You will need to replace the pack. You can find one here http://www.nbkit.com/Wholesale/product/New-Advent-Roma-2001-Laptop-battery-4-Cell-Original_28250_c445573.html or look on your own.

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dear,

first of all, let it charge completely that may take serveral mins or an hour.
if you see the battery after some mins it will show like this and maybe it go down when u use your cell phone... so keep it charged completely.

goodluck...

the problems is the the phone, replace the battery, with lithium battery charge better when the battery is almost completely dead. try not to over charged the battery.

need replacement
http://www.batteries4laptop.co.uk/9cell-dell-d620-battery.html

try wiping off the connections n hold button down for a min.

If the mobile is too old, then it could be because of the battery of the mobile is old and so not functioning properly. Or if you cell is not too old but faced any kind of accidents such as falling from a good height or something like that, then once again, your battery may be not functioning properly due to that. Or else, you will have to contact the dealer from whom you bought the cell phone.

put out battery first than fix it again and restart your phone and than recharge ur cell.